A. F. Blakeslke 35 



TABLE VIII. 



(irafts 

 Species Tested with Q. Results 



1. Datura Stramonium (Jivason Weed) many Always infections (c£. text) 



2. Datura meteloides 3 Infection, but slow in appearing; trans- 



' ferable back to Jimson (cf. text) 



3. Datura ceratocaula 2 No infection evident, except three slightly 



abnormal flowers (cf. text) 



4. Brotcallia demissa 5 No infection ; cions fruited 



5. Capaicum annuum (Ve^i^ex) ... 2 No infection ; one cion fruited 



6. Lycopersicuniesctilentum(Toma,to) 3 No infection; cions fruited; one out of 



three grafts back to Jimson caused infec- 

 tion 



7. Nicotiaiia ajfinis 1 No infection 



8. Nicotiaiia Tabacum (Tobacco) ... 3 No infection ; cions fruited 



9. Petunia hybrida 8 No infection ; cions fruited (cf. text) 



10. Solanum ' Pseudo-capsicum (Jeru- 2 Slight infection ; back graft to Jimson 



salem Cherry) caused infection in one case out of two 



(cf. text) 



11. Solanum citrulUfolium 2 No infection ; cions with flowers and spiny 



burs 



12. Solanum Dulcamara 3 No infection ; cions fruited ; back graft to 



Jimsons caused no infections 



13. Solanum Melongena (Egg-plant) 2 One cion showed slight infection ; one 



cion fruited (cf. text) 



14. Solanuvi tuberosum (Potato) ... 2 No infection 



EXPLANATION OF PLATES. 



PLATE II. 



Fig. 1. Seedlings in 3-inch pots; upper row Quercinas, lower row normal controls. 

 Fig. 2. Later stage of same seedlings shown in Fig. 1 similarly arranged. Lower left con- 

 trol now seen to be Q. 



PLATE III. 

 Fig. 3. Buds and mature flowers of Jimsons; at extreme right calyx removed ; upper row 



Q., lower row normal. 

 Fig. 4. Dissections of pistils and stamens ; left row Q., right row normal ; figure slightly 

 enlarged. 



PLATE IV. 

 Fig. 5. Upper row successive leaves from a normal plant ; lower row, the same from 



a comparable Q. plant. 

 Fig. 6. Branch of a field-infected Q. plant showing degrees of spininess from normal armed 



to almost entirely smooth. 

 Fig. 7. (Insert, in Fig. 6.) Capsule with one side smooth and other side spiny from field- 

 infected Q. plant. 



PLATE V. 

 Fig. 8. Green-stemmed stock with purple Q. cion grafted on left fork and purple normal 

 cion grafted on right fork. Infection has caused production of smooth capsules on 

 the normal cion and on the two branches of the stock below the fork. 

 Fig. 9. Cions of Datura meteloides grafted on to normal Jimson at left and on to Quercina 

 Jimson at right. D, meteloides cion on Q. stock shows infection in crumpUng of 

 leaves. 



3—2 



